#toTop{
    display:none;
    text-decoration:none;
    position:fixed;
    bottom:10px;
    right:10px;
    overflow:hidden;
    width:32px;
    height:32px;
    border:none;
    text-indent:-999px;
    background:url("../img/ui.totop.png") no-repeat left top;
}

#toTopHover{
    background:url("../img/ui.totop.png") no-repeat left -32px;
    width:32px;
    height:32px;
    display:block;
    overflow:hidden;
    float:left;
    opacity: 0;
    -moz-opacity: 0;
    filter:alpha(opacity=0);
}

#toTop:active, #toTop:focus {
    outline:none;
}